KR100738391B1 - Combination structure of camera module - Google Patents

Abstract

The present invention relates to a coupling structure of the barrel and the housing constituting the camera module.

The engagement structure of the camera module of the present invention includes: a housing having an IR filter embedded in an inner center thereof, and a lower engaging surface formed on an inner circumferential surface of a cylindrical barrel extending upwardly; A substrate tightly coupled to the bottom of the housing and having an image sensor chip attached to a central portion thereof; And a barrel having an upper engagement surface protruding from an outer circumferential surface of the cylindrical body, in which at least one lens is mounted and inserted through the upper opening of the barrel, wherein the housing and the barrel are always vertically coupled with respect to the optical axis. There is an advantage that the tilt is prevented and the optical axis is prevented from shifting when the focus is adjusted by the rotation of the barrel, so that the focus is easily adjusted and the resolution is improved.

Camera module, housing, barrel, lower mating surface, horizontal contact surface, barrel, cylindrical body, upper mating surface, sloped surface

Description

Joint structure of the camera module {COMBINATION STRUCTURE OF CAMERA MODULE}

1 is a cross-sectional view schematically showing a conventional camera module.

Figure 2 is an exploded perspective view of a conventional camera module.

3 is an assembled perspective view of the camera module according to the present invention.

4 is an assembled cross-sectional view of the camera module according to the present invention.

5 is an enlarged cross-sectional view of a portion 'A' of FIG. 4.

<Explanation of symbols for the main parts of the drawings>

100. Camera Module 110. Housing

111.Body barrel 112.Lower tooth surface

113, 124. Horizontal contact surface 120. Barrel

122. Cylindrical Body 123. Upper Interface Surface

113a, 113b. 124a, 124b. incline

The present invention relates to a coupling structure between a housing constituting a camera module and a barrel, and more particularly, a stepped mating surface formed on an outer circumferential surface of each member during a focusing process by assembling a lens-mounted barrel and an image sensor chip-containing housing. By allowing the vertical coupling with respect to the optical axis by the, to prevent the optical axis of the camera module is twisted, and to the resolution structure of the camera module to improve the resolution.

In general, the camera module (CCM: COMPACT CAMERA MOUDULE) is compact and is applied to various IT devices such as a camera phone, a PDA, a smartphone, and a portable mobile communication device such as a toy camera (TOY CAMERA). Increasingly, devices equipped with small camera modules are gradually being released to meet various consumer tastes.

Such a camera module is manufactured using an image sensor such as a CCD or a CMOS as a main component, and collects an image of an object through the image sensor and stores it as data in a memory in the device, and the stored data is stored in the LCD or PC in the device. The image is displayed through a display medium such as a monitor.

Figure 1 is an exploded perspective view of a conventional camera module, Figure 2 is a schematic cross-sectional view showing a conventional camera module, the conventional camera module 10 is a CCD or CMOS image sensor (2) printed by wire bonding The substrate 1 is bonded to the bottom of the housing 3 made of plastic, and the barrel 6 with the cylindrical body 5 extended downward is coupled to the barrel 4 extending above the housing 3. .

The camera module 10 is coupled to the housing 3 and the barrel 6 by screwing the female screw portion 4a formed on the inner circumferential surface of the barrel 4 and the male screw portion 5a formed on the outer circumferential surface of the cylindrical body 5. do.

In this case, an IR cut-off filter (hereinafter referred to as an 'IR filter') is formed between the upper surface of the printed board 1, that is, the lens L mounted on the lower end of the barrel 6 and the image sensor 2. (8) is combined to block the infrared rays of excessive long wavelength flowing into the image sensor (2).

In the camera module assembled as described above, light flowing from a specific object passes through the lens L, and the image is inverted to focus on the surface of the image sensor 2, where the screw is coupled to the upper end of the housing 3. While rotating the barrel 6, the adhesive is injected between the housing 3 and the barrel 6 at the point where the optimal focus is achieved, and the housing 3 and the barrel 6 are adhesively fixed to the final camera module product. Produced.

On the other hand, as the functional elements of cameras that consumers demand have increased in recent years, camera modules with an autofocus (A / F) function or a zoom function have been developed and mounted on mobile phones. The fixed camera module is mainly produced. In the conventional camera module, a combination of the barrel 6 and the housing 3 for performing the assembly and focusing process of the module corresponds to the female and male threads 4a and 5a. It is mainly made of a rotating structure by coupling.

However, it is difficult to manufacture a mold for forming the female and male screw portions 4a and 5a on the outer circumferential surface of the barrel 6 and the inner circumferential surface of the housing 3, as well as the female and male screw portions 4a and 5a. Is inclined at a predetermined angle, so the optical axis of the lens may be inclined by the inclination angle of the thread when the housing 3 and the barrel 6 are rotated along the thread, which makes it difficult to accurately focus. .

In addition, when the housing 3 and the barrel 6 are vertically engaged, when the female and male threads 4a and 5a are engaged at the wrong angle, the threads are crushed or the friction of the female and male threads 4a and 5a is prevented. Thereby, there is a disadvantage in that the assembling properties such as foreign matter defects caused by the generation of fine particles as the bonding portion is worn is significantly reduced.

Accordingly, the present invention was devised to solve the above-mentioned disadvantages and problems in the assembly process of the conventional camera module, and facilitates assembly of the housing and the barrel constituting the camera module and is perpendicular to the optical axis in the focusing process. In order to fix the focus in the direction of the inner and outer peripheral surfaces of the housing and the barrel is composed of a stepped mating surface, so that the vertically fixed to the optical axis of the camera module and at the same time the resolution of the camera module is provided to improve the resolution There is an object of the invention.

The object of the present invention is a housing, the cylindrical barrel is coupled to the bottom surface and the casing is formed on the inner circumferential surface is formed on the inner circumferential surface and the cylindrical body is equipped with a multi-stage lens in the bottom Consisting of the barrel formed to extend, the cylindrical body of the barrel is achieved by the structure of the camera module vertically coupled into the barrel of the housing.

The housing has a built-in IR filter for blocking long-wavelength infrared rays incident from the lens of the barrel in the lower portion of the cylindrical barrel, and the haptic surface is provided with a plurality of horizontal contact surface stepped stepwise from the top of the inner circumferential surface of the barrel Is formed.

In addition, the barrel is formed with a cylindrical body extending below the disk-shaped lens fixing portion, and a stepped mating surface is formed on the outer peripheral surface of the cylindrical body with a plurality of horizontal contact surface inclined downward.

The barrel has a lower cylindrical body inserted through the upper opening of the barrel of the housing, and the horizontal contact surfaces of the stepped mating surfaces formed on the inner and outer peripheral surfaces of each member are brought into close contact with each other, and the horizontal contact surfaces are rotated by the rotation of the barrel. As a result of close contact with the multi-stage, the housing and the barrel are always coupled in a direction perpendicular to the optical axis incident through the lens mounted on the lens fixing part of the barrel, and at the same time, the focusing of the lens can be performed.

Matters relating to the operational effects including the technical configuration for the above purpose of the tooth structure of the camera module of the present invention will be clearly understood by the following detailed description with reference to the drawings in which preferred embodiments of the present invention are shown.

Camera Module Structure

First, FIG. 3 is an assembled perspective view of a camera module according to the present invention, FIG. 4 is an assembled cross-sectional view of the camera module according to the present invention, and FIG. 5 is an enlarged cross-sectional view of part 'A' of FIG.

As shown, the camera module 100 according to the present invention is a cylindrical barrel 111 formed of a multi-level lower engagement surface 112 on the inner circumferential surface to the top of the housing 110 in which the image sensor (S) is built in the lower portion Is formed, the cylindrical body 122 is inserted through the upper opening of the barrel 111 and provided with the upper engagement surface 123 on the outer circumference is composed of a barrel 120 formed to extend downward.

The housing 110 is coupled to a substrate 130 on which the image sensor S is mounted, and a bottom surface of the substrate 130 coupled to the housing 110 is attached to an upper surface of the FPCB so that the image sensor S is attached to the housing 110. ) Is sent to the image display through the circuit of the FPCB.

In addition, the housing 110 has a built-in IR filter 140 to block the infrared light of the long wavelength included in the light beam flowing into the image sensor (S) in the lower inner side of the barrel 111 of the upper side of the image sensor (S). The upper surface of the IR filter 140 is formed with a stepped lower engagement surface 112 stepped in multiple steps along the inner circumferential surface of the barrel 111.

The lower mating surface 112 formed on the inner circumferential surface of the barrel 111 starts at a predetermined point at the upper opening of the barrel 111 so that a plurality of horizontal contact surfaces 113 are arranged stepwise downward in a multistage step, thereby forming an overall shape. It is formed to be inclined downward in a spiral along the inner circumferential surface of the barrel (111).

At this time, both side portions of the plurality of horizontal contact surfaces 113 are formed with inclined surfaces 113a and 113b tapered in one direction, and inclined surfaces 113a and 113b of both sides are formed downward or upward inclined surfaces at the same angle.

On the other hand, the barrel 120 coupled to the housing 110 has a multi-stage upper teeth on the outer circumferential surface of the cylindrical body 122 extending below the disc-shaped lens fixing portion 121 in which the lens L is mounted at the inner center thereof. A haptic surface 123 is formed.

The upper engagement surface 123 of the barrel 120 has the same helical angle as the lower engagement surface 112 of the housing 110 is formed protrudingly inclined upwardly on the outer peripheral surface of the cylindrical body 122, A plurality of horizontal contact surfaces 124 are formed at the bottom of the upper engagement surface 123 to form a stepped portion of the multi-stage and are inclined upward in stages.

In addition, the horizontal contact portion 124 of the upper engagement surface 123 is formed to be inclined upward or downward inclined surfaces 124a and 124b of the same angle to both sides.

As such, the upper and lower engagement surfaces 112 and 123 are formed as stepped portions of the multi-stage so that the overall shape is inclined to one side at the same spiral angle, and the stepped portion is a horizontal contact surface 113 perpendicular to the optical axis. The inclined surfaces 113a and 113b and 124a and 124b, which are formed as 124 and inclined upward or downward by a predetermined angle, are coupled to the housing 110 to couple the barrel 120 to the barrel 120. ) Rotates the horizontal contact surfaces 113 and 124 formed on both sides of the horizontal contact surfaces 113 and 124 of the mating surfaces 112 and 123 formed on the members 110 and 120. The sliding contact between the inclined surfaces 113a and 113b and 124a and 124b controls the gap between the image sensor S inside the housing 110 and the lens L mounted on the barrel 120.

Focusing structure of the camera module

The camera module of the present invention having the structure as described above has a cylindrical body in which the upper engagement surface 123 is inclined upwardly on the outer circumferential surface through the upper opening of the barrel 111 in which the lower engagement surface 112 is inclined downward on the inner circumferential surface ( 122 is inserted to form a coupling of the housing 110 and the barrel 120.

At this time, the upper and lower engagement surfaces 112 and 123 to be engaged within the barrel 111 are horizontal contact surfaces 113 and 124 and inclined surfaces 113a and 113b of the engagement surfaces 112 and 123, respectively. 124a and 124b form a helical interface with each other and are tightly coupled to each other, and the barrel 120 is vertically inserted and mounted at the top of the housing 110 such that the upper and lower mating surfaces 112 and 123 are in close contact with each other. .

As such, when the housing 110 and the barrel 120 are vertically coupled, a focusing process for adjusting the focus of the camera module by rotating the barrel 110 about an optical axis is performed. By rotating left and right, the optimum focus is adjusted by adjusting the distance between the image sensor S and the lens L in the housing 110.

Here, each of the mating surfaces 112 and 123 to be engaged within the barrel 111 of the housing 110 is a horizontal contact surface 113 and 124 of each mating surface 112 and 123 around a spiral interface. As the horizontal contact surfaces 113 and 124 are gradually treated to each other, the vertical movement of the barrel 120 is performed within the barrel 111 of the housing 110.

At this time, the step-wise contact of the horizontal contact surface 113, 124 is made by the sliding flow of the inclined surfaces (113a, 113b) 124a, 124b formed on both sides of the horizontal contact surface (113, 124), the inclined surface ( 113a, 113b and 124a and 124b are horizontal contact surfaces 113 and 124 to enable smooth transfer of the horizontal contact surfaces 113 and 124 when the barrel 120 is rotated clockwise or counterclockwise. It is formed obtusely with respect to the obtuse angle.

In addition, the inclination angles of the inclined surfaces 113a and 113b and 124a and 124b are such that the inclined surfaces 124a and 124b connecting the upper horizontal contact surface 124 when the barrel 120 is rotated counterclockwise are lower horizontal contact surfaces. When the inclined surfaces 113a and 113b connecting the 113 are in contact with each other, the predetermined bending portions formed by the horizontal contact surfaces 113 and 124 and the inclined surfaces 113a and 113b and 124a and 124b may naturally ride over. It would be desirable to form at an angle.

According to the present invention, the barrel 120 is vertically inserted in the upper portion of the housing 110 so that the two members 110 and 120 are perpendicular to the optical axis, and then the barrel 120 is clockwise or Each of the horizontal contact surfaces 113 and 124 of the upper and lower mating surfaces 112 and 123 engaged between the barrel 111 of the housing 110 and the body 122 of the barrel 120 by rotating the counterclockwise direction. The focusing process of the camera module is performed by adjusting the height of the barrel 120 according to the stepwise treatment, and at the same time, the camera module can be assembled in a direction perpendicular to the optical axis. By injecting adhesive between the contact surface of the housing 110 and the barrel 120 at the point where the optimal focus is through, the final production of the camera module product is completed by adhesively fixing the housing 110 and the barrel 120.

The present invention is not limited to the above-described technical configuration, but may be structurally various modifications and changes by those skilled in the art, which should be considered to be included in the spirit and scope of the present invention as defined in the appended claims. something to do.

As described above, the coupling structure of the camera module of the present invention is always connected to the optical axis by the housing and the barrel by the corresponding coupling between the inner circumferential surface of the housing constituting the camera module and the upper and lower engagement surfaces respectively formed on the outer circumferential surface of the cylindrical body of the barrel. By being vertically coupled, there is an advantage that the tilt of the optical axis is prevented, and the focusing and resolution are easily improved as the optical axis is prevented from shifting when the focus is adjusted by the rotation of the barrel.

Claims (8)

A housing having an IR filter embedded therein and a lower mating surface formed on an inner circumferential surface of the cylindrical barrel extending upwardly; A substrate in close contact with the bottom of the housing and having an image sensor chip attached thereto; And And a barrel having an at least one lens mounted therein and having an upper engagement surface protruding from an outer circumferential surface of the cylindrical body inserted into the housing through the top opening of the barrel. The method of claim 1, The lower engagement surface is a coupling structure of the camera module, characterized in that a plurality of horizontal contact surface is formed in a multi-stage stepped inclined downward spirally along the inner circumferential surface of the barrel. The method of claim 1, The upper engagement surface is a coupling structure of the camera module, characterized in that a plurality of horizontal contact surface is formed in the stepped portion of the multi-stage and inclined upward in a spiral along the outer peripheral surface of the cylindrical body. The method according to claim 2 or 3, The horizontal contact surface, the engagement structure of the camera module, characterized in that the tapered inclined surface formed on both sides. The method of claim 4, wherein The inclined surface is a tooth structure of the camera module, characterized in that consisting of a downward or upward inclined surface at the same angle. The method of claim 5, The inclined surface is a coupling structure of the camera module, characterized in that formed obtuse angle with respect to the horizontal contact surface. The method of claim 2, The lower engagement surface is a coupling structure of the camera module, characterized in that the horizontal contact surface and the inclined surface is formed in a spiral continuous at any point of the upper opening of the barrel. The method according to claim 2 or 3, The engagement surface is a camera module, characterized in that the barrel is moved vertically with respect to the optical axis in the barrel of the housing as the horizontal contact surface is formed by sliding the horizontal contact surface in step by contact with the center. rescue.

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